OTA version includes MEF-3 and external Camera
Angle Adjuster. Cradle, 7x50 finder and finder bracket not
astrophotographers see in the FSQ-106ED one of the best
astrographes available for the amateur astronomers. With its
focal length of 530mm, an image circle of 88mm and a
photographic field of 9,5°, it acts as teleobjective for
most powerful CCD and DSR/DSLR cameras of the market.
Based on a Petzval quadruplet optical
design with apochromatic ED glasses, the FSQ-106ED is
optimized for wide-field imaging of the deep sky. It offers
a flat field, and comes equiped with a built-in camera angle
adjuster and an oversized rack-and-pinion focuser. To
minimize the size of the optical tube, it includes a
retractable dewshield and an important backfocus.
The modified Petzval design of the
FSQ-106ED, with the field flattener integrated inside the
tube, makes it possible to cover all the photographic
formats, from 35mm SLR/DSLR to 6x7 cameras. Its photographic
image circle of 88mm of diameter (field of 9,5°) does not
have an equivalent on the market of the refractors of 100mm
of aperture. CCD users will be able to dream with the use of
large sensors without risk of vignetting or loss of
definition in edge of field. As it is the tradition inside
Takahashi company, the objective is entirely collimatable in
order to compensate for the possible mechanical and thermal
stresses. A perfect image is at this price.
Optics of exception goes of course with
mechanics of exception. To replace the traditional camera
angle adjuster, Takahashi integrated an oversized rotative
rack-and-pinion focuser in the design of its optical tube.
This device offers a perfect rigidity to all the types of
photographic assembly, even the heaviest. Voluntarily
limited, the rack-and-pinion course is controlled by a
double system of focusing including a 1/7 microfocuser.
The optical tube assembly is equipped with a retractable dew
shield, to gain in volume.
Resolutely directed towards
astrophotography, the FSQ-106ED has very many accessory
assemblies including visual ones. It has a 186 mm backfocus,
which will charm the most demanding users. For examples of
assembly, please see system-charts.
Even though this refractor is compact, it is quite heavy
(125mm of diameter for a weight of 7 kg). Association with
the EM-200 equatorial mount is ideal, including with a
guidance system TGM in parallel. Many hardware
configurations are available to optimize this astrograph and
to turn the astrophotography of the deep sky into a moment